Limiting-stop for revolver-cylinders



D. B. WESSON. LIMITING STOP FOR REVOLVER CYLINDERS.

(No Model.)

No. 542,745. Patented July 16, 1895.

ZWI T/VESSES.

WYLM

UNITED STATES PATENT OFFICE.

DANIEL B. WESSON, OF SPRINGFIELD, MASSACHUSETTS.

LIMITING-STOP FOR REVOLVER-CYLINDERS.

SPECIFICATION forming part of Letters Patent No. 542,745, dated July 16,1895.

Application filed February 23,1895- Serial No. 539,379- (No model.)

To all whom it may concern.-

Beitknown that I, DANIEL B. WEssoN, a citizen of the United States,residing at Springfield, in the county of Hampden and State ofMassachusetts, have invented new and useful Improvements in RevolvingFirearms, of which the following is a specification.

This invention relates to revolving firearms, the object being toprovide improved means for the engagement of the cylinder with the frameof the arm, whereby the cylinder is more firmly held against either aforward or arearward movement; and the invention consists in theimproved means for so holding said cylinder, all as hereinafter fullydescribed, and more particularly pointed out in the claims.

In the drawings forming part of .this specification, Figure 1 is aperspective view of the cylinder and a portion of the frame of arevolver em'bodying my improvement and of that classof armsin which thecylinderis hung upon a yoke which swings in 'the frame to carry saidcylinder to one side and sufficiently out of said frame to permit ofejecting empty cartridge-shells and reloading the cylinder. Fig. 2 is aside elevation of said part of the frame of the arm, and Fig. 3 is alike view of the cylinder. Figs. 4 and 5 are side elevations,respectively, of a frame part and cylinder, illustrating a modificationof the construction of the cylinder-holding devices shown in thepreceding figures.

In the drawings A indicates that part of the frame of a revolver towhich the cylinder is connected. 1

B is a part of the swinging yoke-frame, on which the cylinder 0 issupported, said yokeframe having an arm,on which it swings, entering asocket (shown in dotted lines) in the part of said frame under thecylinder-opening therein, and a second arm or base-pin, as generallytermed, on which the cylinder rotates, all as shown in detail anddescribed in my Patent No. 517,152, dated March 27, 1894.

The cylinder-locking pin D has a longitudinal movement Within thecylinder, its rear end engaging in a socket in the frame to lock thecylinder in firing position when swung into the frame. E indicates therear end of the barrel in the frame.

The aforesaid cylinder-locking improve ments are constructed andarranged as follows: The cylinder 0 has a border f around its rear end,projecting beyond the plane of the outer surfaceofthe cylinder, and agroove his made in and across the part3 of the-frame A under thecylinder, which groove receives the said projecting border or flange fon the cylinder when the latter is hung on its yokeframe B, as inFig. 1. The thickness of said border or fiangef and the width of saidgroove h are such that the cylinder may, while said flange is inengagement with said groove, rotate freely. cylinder may take placeeither toward or from the recoil plate J. Thus in the act of firing thearm the cylinder is provided with additional means of resistance againstthe tendency to forward movement or one from the recoil-plate induced bythe explosive force of the charge when firing. When the cylinder andcylinder-supporting frame are swung to the side of the arm, as in Fig.1, this being the position for extracting the spent cartridge- 7 5shells and for loading the cylinder, the rim or flange f on the cylinderextends into the grooveh in the frame and the cylinder is firmly heldagainst front or rear movement and the side swinging frame is greatly relieved from strain. In some classes of arms said additional means ofresistance against the tendency of the cylinder to move away from therecoil-plate aids in preventing the bursting of the heads of thecartridges and contributes generally to safety and convenience in theuse of the arm. The said modification illustrated in Figs. 5 and 6consists in providing a circular groove 4 in the cylinder and inproviding a fixed projection K on the frame, which when the cylinder isin the latter engages in said cylinder-groove. In the above-describedmodification substantially the same operative results are secured asthose pertaining to the construction illus- 5 trated in Figs. 1 to 3,inclusive.

The within-described devices for holding the cylinder of a revolvingfirearm, as described, are in the nature of an improvement upon thedevice patented to Trabue, No. rcc

301,180, dated July 1, 1884:. A device similar to Trabues is also shownin Fig. 7 of patent to Warnant, No. 301,649, dated July 8, 1884; but thelatter-named device is objectionable,

No perceptible movement of the 65 since the rear end of the cylinderwould bear against the projection there shown during its entire swingingmovement, making it hard to swing it and impossible if the cartridgesshould swell on explosion.

Having thus described my invention, what I claim, and desire to secureby Letters Patent, is

1. In a revolving fire arm, the frame, ayoke supported in the frame andswinging to the side of said frame as described, and the cylindersupported on said yoke, and having a projecting rim near its rear-endwhich enters a groove in the frame, substantially as described.

2. In a revolving fire-arm, the frame, a yoke supported in the frame andswinging sidewise, the cylinder supported on said yoke, said frame andcylinder having interlocking pro- DANIEL B. WESSON. VVitnesses:

H. A. CHAPIN, K. I. OLEMoNs.

